A corpora



M. s. TOWSON AND 0. IE. cocnnm.

INDUSTRIAL njwcx, APPLICATION FILED MAR. H). 1919.

Patentd Jan. 4,1921.

3' SHEETS-SHEET 1 M. S. TOWSON AND C. E. COCHRAN.

INDUSTRIAL TRUCK.

APPLICATION FILED MAR. 10. 1919.

1,364,416. Patented Jan. 4, 1921.

3 SHEETS-SHEET 2- marzmelnpummml L M. S. TOWSO'N AND C, E. COC HRAN.

INDUSTRIAL TRUCK.

APPLICATION FILED MAR. I0, 1919.

Psite nted Jan. 4, 1921.

3 SHEETSSHEET 3.

UNITED STATES .PATENT'YO'FFICE. MORRIS s. rowson AND CLYDE n. ooonnnn,or cLEvnLANn, cine, Ass IGnoBs 'ro THE ELWELL-PARKER ELECTRIC COMPANY,or oLEvELnm), 01:10, A] oonronng non or 0310.

To all whom it may concern:

Be it known that we, MORRIS S. ToWsoN and CLYDE E. GOCHRA'N, citizens ofthe United States, residing at Cleveland, in the county of Cuyahoga andState of Ohio, have invented a certain new and useful Improvement inIndustrial Trucks, of which the fol lowing is a full, clear, and exactdescription, reference being had to the accompanying drawings.

This invention relates to an industrialautomobile truck having a loadsupport adapted to betilted by powermechanism, enabling the truck toreceive a suitable standing load, tip it overabove the running; gear ofthe truck and then,fafter transporting it, deposit it in the standingposition. The invention is shown as embodied in a truck designedparticularly. "for handling large rolls of paper, suehas, are used forweb printing presses. In such embodiment there is provided the truckproper with its running gear and propelling mechanism, and a suitableplatform hinged adjacent to the rear end of the truck, and mechanism fortipping the platform about SllOlh-PIVQU into an approximately uprlghtposltion in,

which the upright roll of-paper may be secured to it, the reversemovement of such tiping mechanism then restoring, the platform to asubstantially horizontal position for transportation. This particularform of our load handling truck is shown in the drawings hereof and ishereinafter more fully described. The essential characteristics of theinvention, which are. illustrated by this embodiment, are set out in theclaims.

In the drawings, Figure 1 is a side elevation of the truck, showing infull lines the platform in transportation position witha roll of paperthereon and showing in broken Specification of Letters Patent.

INDUSTRIAL 'rnucx.

tion'al elevation of the operating screw and the worm .wheel whichconstitutes. a nut therefor, thls view being at right anglesto ported byrear wheels 11 and azpair of'for-' ward wheels These forward wheelsarePatentedJan.4,-1921. Application filed March 1o,-191;. .a;1 a. 231,114.

s shown in 'and 2, 10 indicates,

. the frame or body of the truck, which Is sup-. 6 i

on o posite sidesiof a front housing 13-compose of upright andtransverse members securedto the frame bars 10. This housing carries asuitable motor lifor driving the front wheels and has'a'space 15abovefor a storage battery. The front wheels are steered in any suitablemanner, as indicated by the steering lever; 16. The construction of theframe, wheels, motor, etc., already,

described does not enterin'to the present in March 19, 1918, toThe'Elwell-P'arker Elecvention. They may be formed, if desired,according to Patent No. 1,260,145, granted tric Company as'assignee ofClyde E. Coch- In the present invention we secure to the frame barslOoat' their rear ends, a pair of brackets 20 which extend upwardly andrearwardly. At. their. upper ends thesed brackets pivotally carry thecradle or platform which receives the load, and will [be specificallyvaried in form according to the characterof the load. a As shown,thisplat form consists of a'fpair' of outwardly facing channelbeams 3Q'and anfintermediately dey 1 pressed cross plate 31 secured to the upperflanges of the channel beams. The depression is adapted'to laterallyposition a roll of brackets 20 to thesebeams isshown'as er: fected by atransverse shaft 25. connectingv so I paper designated A. The pivotingof the",

the upper ends of the brackets 20 with eyes in b1ocks'32secured to theunder sides of the beams 30. The construction described s V makes aneffective and firm pivoting of the platform to the'truck frame.

gearing being arranged to pull or push a To operate the platf rm, weconnect it by rod longitudinally, whichoperates the link age system.This will now be described. 1

Each of the brackets 20 has a portion extending downwardly at the rearend. of the l truck frame. To these downward extensions are pivoted at26 a pair of links 40," the shown ashaving eyes on their forward endssurrounding the shaft 41, and'at their rear ends having eyes throughwhich extend pins into blocks 44 secured to the inner faces *of theplatform frame bars.

The central portion of the shaft 41 is embraced by an eye in the end ofa main link 45 which at its forward end has aneye em bracing a shaft 46.This shaft is mounted through-shaft 49 extending across the truck in theupper ends of a pair of arms 47 pivoted at their lower ends to brackets48 carried by the truck frame bars 10. This pivoting is shown aseffected by means of a frame. In the arms 47 we mount a transverse rod50 which is embraced by an eye 51 on the rear end of the push and pullrod 52'. This pushand pull rod may be said to form the operating memberof the linkage system described. It is suitably connectedwith the motordriven gearing and furnishes the. means for actuating the mam link 45;ThlS.

will be hereinafter described. For the present it may be noted that aforward pull on this main link carries the mechanism into the ultimateposition shown in Fig. 2, wherein the platform is nearly vertical,whereas a rearward push onthis'link shoves on the toggle knuckle 41,straightening the toggle composed of the links 40 and 42 and bringingthe platform into the horizontal position shown in Fig. 1.

It will be seen from Fig. 1 that when in transporting position the bulkof the load is carried by the shaft 25 and brackets 20 to the truckframe. A portion of the load is carried by a horizontal bracket 18secured to the rear face of the forward housing 13. The straightenedtoggle makes a strut between the rear portion of the load and the lowerend of the brackets 20 and steadiesthe load.

Rolls of paper are frequently stored on their ends. When used fortransporting such roll, the roll may first be very readily tipped upslightlyon one edge and the truck with its platform or cradle uprightbacked against the roll so that a cleat 35 on the rear or lower end ofthe cradle lies beneath the elevated bottom edge of the roll; then theroll is tipped over in the other direction to lie against the cradle andis secured by passinga cable aroundthe upper portion thereof, asillustrated in Fig.2, where the cable 38 extends about the roll and atits ends hooks onto pins 39 extending outwardly from the cradle beams.

After the roll of paper has been clamped to the cradle, a push on therod 52 shoves the linkage system rearwardly, shoving on the toggle joint41, straightening the toggle to tip the load over in the position shownin full lines in Fig. 1. After the center of gravity of the load haspassed to the front of the shaft 25 the weight of the load tends toassist in the straightening of the toggle, and the mechanism of the;operating;rod 52 then holds back the load to prevent too rapid descent. Inunloading, a pull on the rod 52 swings the load into the position shownin Fig. 2, whereupon the cable clamp 38 is removed and the roll'tippedinto a more nearly vertical position, after which the truck pulls awayfrom it, allowing the cleat 35 to clear the roll, leaving it standingupright in its new position.

It will be seen from the description of operation that the mechanismmust be able to effect at will a pull or push on the rod 52 and to holdthat rod against movement independently of such mechanism. The operatingmechanism which we have shown for effecting this push and pull issubstantially that shown, described and claimed in the patent heretoforementioned. It will be now more fully explained. I

The push-and-pull rod 52 extends into a housing 60 which is providedwith trunnions61 pivoting it to frame brackets 62 carried by the truckframe. Within this housing the rod carries an external screw thread 63(Fig. 6). Surrounding this thread and journaled in the housing is a nut64 which carries worm teeth 65. These teeth mesh with a worm 66 on ashaft alined with and engaging the armature shaft of the motor 67.Accordingly this motor, by rotating the worm-wheel nut, may screw theshaft 52 in one direction or the other, as required, while when themotor is stationary the system is locked and the cradle heldaccordingly.

To prevent damage to the parts in case the cradle should be brought to astop in either direction while the motor is still runmng there isprovided a slip connection between the worm teeth and the nut. This isaccomplished by making these worm teeth on a ring separate from the nutbut surrounding it and held to it frictionally. To effect the frictionalholding there is provided a ring 70 overlapping the nut and the ringcarrying the worm teeth and drawn toward these parts by springs 71surrounding bolts 72 extending through them. Suitable ballbearings 73and 74 may take thethrust of the worm wheel nut in either direction. Thecasing 60 is preferably made separable, as indicated by the removableportion 75, to allow access to the interior. This interior is packedwith grease, which is retained in place by the stuffing box 7 6surrounding the rod 52.

If desired an automatic magnetic brake may be provided on the armatureshaft for stoppingits rotation instantly when thecur rent is shut off.Theexterior ofthis brake 1s indicated at 79 in Figs. 3 and 5 and asuitable construction thereof is described in" the patent referred to. 7

Having thus described our invention, what we claim is:

1. The combination of a truck frame having a forward housing and a rearextension, a bracket mounted on said rear extension, a load carrierpivoted to the top of the bracket, said bracket having a dependingportion, a toggle joint having its links pivoted respectively to thedepending portion of the bracket and to the load carrier at the rear ofits pivotal engagement with the bracket, a longitudinal rod connectedwith the knuckle of the toggle, and motor mechanism mounted in thehousing for operating said rod.

2. The combination of a truck frame, a bracket at the rear end thereof,a load carrier pivoted to the top of the bracket, a toggle joint havingits links pivoted respectively to a support at the rear end of the frameand to the load carrier at the rear of its pivotal engagement with thebracket, a

1 casing carried by the truck, a longitudinally movable rod extendinginto said casing and connected with the toggle joint, a motor andgearing carried by said casing for moving said rod longitudinally.

3. The combination of a truck having supporting wheels, a front housingand a rear frame extending from the lower portion of the housing, abracket secured to the rear frame and extending toward the rear and bothupwardly and downwardly, a load its pivotal connection to thebracket,motor mechanism supported within the housing,- and aconnection'betweenthe same and the knuckle of'thetoggle; I

4. The combination of a truck having supporting wheels, a front housingand a;

rear frame extending fromthe'lower por- 5 tion of the housing, a bracketsecured to the rear frame and extending upwardly and toward the rear, aloadcarrier pivoted to the upper end of the bracket,'a toggle jointhaving its links connected respectively with a" lower end portion ofthe frame and with i the load carrier beyond its pivotal connection tothe bracket, motor mechanism within the housing, connecting mechanismbetween the same and the knuckle of the toggle, and v a bracket carriedby'the rear face of the housing for supporting the forward end of theload carrier. I

s 5. The combination with a truck having supporting wheels and arearwardly extending frame, comprising two longitudinal beams side byside and spaced apart, a

bracket secured to the rear portion of each beam, said bracket extendingdiagonally upwhen horizontal, a toggle mechanism for,

swinging the load carrier, and motor mechanism within the housing foroperating the toggle mechanism. k I

In testimony whereof we hereunto afiix our signatures. r

MORRIS s TOWSON. i

CLYDE E. coonnxn

